Method and apparatus for finishing compacts



c. E. RoBERTs Ef AL' 1375,602

Filed Nov. 11, 1927 2 shuts-shut 1 Sept. 9, 1930.

uETHon AND APPARATUS Fon FINISHING couPAcTs Sept 9, 1930 Y c.'E. ROBERTS Er Ax.

IETHOD AND APPARATUS FOR FINISHING GOIPAGTS Filed Nov. 11, 1927 2 Sheets-Sheet 2 Patented Sept. 9, 1930 UNITED- STATES' PAUsNLTA OFFICE( CHARLES R. ROBERTS, oir oAKrARK, AND JOHN n. HRLRRICH, or WHEAT'ON, ILLINOIS;

AssIGNoRs RY DIRECT AND MEsNE,AssIGNMENTs, rosari) JOHN. H. HELFRICH: 4,

METHOD AND AIPYARATUS FORV FINISH-ING COMPACTS YApplicativifiledNovember11,1927.. semaine. 232,579.

wisereduced tothe proper condition for. use,

it is customary'to.inish` the, mass off material to eXact sizebydressing oifV the surface with a sheetof sandpaper or thelike. The compact is. originally' formed.. with a trifle excess material to enable this to-be. done.y

In the `accomj)anying drawings, Figurev 1 is a vertical central section through an apparatusf'or finishingy compacts according toV the invention;,f

`Iligure 2 is asectiononlineQf-Q ofrFig, 1,;

Figure 3 is a plan view of' the compact holder; C Y Y Figure t is, a side, elevationof thecompact holder with the compact indicated in dotted lines;

lFigure, 5 isa `detail section on linef5-5 oFig; '4 .y o

Figurey 6 is asecti'onI asA on.. line.. 2&2. of Fig. 1, indicating thesupporting meansgtor the entireapparatus; andl Figure 7 is a front elevation, of the .entlre apparatus. j L In the embodiment of apparatusaccordmg to the` invention selected for illustration, the compact is mounted for rotation on a support 10 by simply placingit on, top of the support. It is held in place during rotation by abutment with twol fixed abutments '12, and aresilient holding clip 14 having va tip 16 and a body portion curved around. the side of the support 10 and riveted thereto at 18. The abutments 12 are equally spaced from. a point diametrically opposite the. tip

16. They are illustrated ashaving the `form of simple rivets with af small segmentalportion-'of the. head` ofV each. rivet projecting abovethe plane of the lattop of the sup-Y port. VTheserivets arey a. light driving tit, and; when, the portion; of the .head projecting above, has been wornaway by longuse, the

vabutmentcanfbe,loosenedand rotated a few degrees about-.its axis, toibring(V a freshv segnient into play.

Y vIt sometimes happensthat themetal plates for the compacts are not exactly round` or exactly true, to.size, andsometimes'v during rotation some defective Vplate may tip-.up or slipl off the;Y support.L We have found. that ifthe direction,ofrotationis as indicated in Eig. 3 any'such platethat happens to.v ily oithe:support-will.fall clear of. it Without injuring the holdingclip or the operator.

We. have provided means torV supporting and'4 driving the compactv support l0.V The shaft 2O is suitably supported for-rotationonv averticalaxis, as by spaced ball bearings 22, and carriesa friction driving pulley 24 at its lower end.. On an axis parallel to that of thefshaft 20, we mounta pivotal support 26 having an eccentric. shaft .28v proj ecting from its lower end.` On they shaft 28 wev mounta friction-drive pulley Sil-inthe same plane as the pulley 24, and a grooved-pulley32 for receiving power from suitable drive means such. as4 a belt 34:. `The pulleys 30 and 32 are rigidly, united into a unitary structure and suitablysu portedon the shaft- 28, as lby spaced ball earings 36. i

lt `will 'beapparent' that thepulley can bepresseda'gains't the pulley 24 byrotating the pivotal support 26.

For convenience.v in controlling the'stopping and. starting of the compact support, weihave'provided means normally urgingzthe pulley 30, against the pulley 24 with suiicient torceiofdrive it, and operator controlled means for intermittently, interrupting the drive tovremove a finished compact. and replace it with an unfinishedy one. VVehave illustrated an arm 38 clamped on the lower end of the pivotal support 26. The rear end ot the arm may be actuated in one direction by a tension spring 40, and in the other direction by a drag link 42 pivoted to the vertical arm of a bell crank lever 44. From the horizontal arm of the bell crank lever 44 the pitman 46 extends down to the control pedal 48. lV hen the operator wishes to remove a finished compact and replace it with an unfinished one. a touch of the operators toe on the pedal 48 will move the drive pulleys out of engagement. A little additional movement will continue the rotation of the pivotal support 26 far enough to bring the brake shoe 50, which is rigidly mounted as at 52 on the lower end of the shaft 28, into frictional engagement with the pulley 24 to stop the rotation of the shaft 2O4 and the compact support. In operation7 the operator, upon beginning work, will first start the electric motor a4 driving the belt 34. Thereafter, the compact suppe-rt will'rotate continuously except when the operator wishes to change compacts and touches the pedal 48.

The finishing of the compacts generates a considerable amount ot powdered material of a sort that is very apt to injure ball bearings or bearings of any description. We have supported the apparatus as a whole on a wooden box or frame 56 having a top 58. which top is impert'orate except for the openings receiving the bearings for the pivotal support 2G and the shaft 20. As these openings are completely filled by the parts received therein. the whole constitutes a complete imperforate barrier, below which the transmission mechanism is housed, protected from the line powder or other dirt that may accumulate on or around the compact support. For completely sealing the only possible point of access to the bearings, we-

have formed the compact support with a depending flange G telescoped over the sleeve 62 in which the ball bearings 22 are mounted. A libre washer G4 lying loosely between the juxtaposed annular faces at the bottom of the support l0 and at the top of the sleeve 62 Completes the seal.

For finishingcompacts of different sizes, it is necessary to have a support for each different size of compact. The support is removably clamped in place on the upper end of the shaft by means oi a set screw 66, so that it can be readily removed and replaced by one having different dimensions at the top.

lVithout further elaboration, the foregoing will so fully explain the gist of our invention. that others may, by applying current knowledge. readily adapt the same for use under various conditions of service.

What we claim is:

l. Compact finishing means comprising a rotatable support for rotating a compact exposed to a tool in the hands of the operator, positive holding means on said support for permitting rapid manual removal of a iinished compact and installation of another unfinished one, and operator actuated control means for stopping and starting said support7 said control means requiring no attention or exertion on the part of the operator when the tool is in use.

2. Compact nishing means comprising a rotatable support for rotating a compact exposed to a tool in the hands of the operator, positive holding means on said support for permitting rapid manual removal of a finished compact Vand installation of another unfinished one, means for rotating said support continuously, and foot-actuated means for interrupting the rotation of said support, while removing a finished compact and installing an unfinished one.

3. Compact finishing means comprising a rotary support; a frame carrying journals for said support; said support extending through said frame, and projecting both above and below the same; said frame being otherwise imperforate; and transmission means housed under and protected by said frame for driving said support; said transmission means including a power receiving element fixed on said support, driving element movable into and out of direct effective driving relationship with said receiving element, and operator actuated control means for moving said driving element into and out of driving relationship; said control means comprising yieldingmeans normally urging said driving element into driving relationship, operator actuated means housed under said frame for positively withdrawing said driving element from driving relationship, and brake means housed under said frame moved into operating position upon withdrawal of said driving element.

4. Compact finishing means comprising a rotary support; a frame carrying journals for said support; said support extending through said frame, and projecting both above and below the same; said frame being otherwise imperforate; and transmission means housed under and protected by said frame for driving said support; said transmission means including a power receiving element liXed on said support7 a driving element movable into and out of direct effective driving relationship with said receiving element, and operator actuated control means for moving said driving element into and out of driving relationship; said control means comprising an offset pivotal support for said driving element, resilient means tending to rotate said pivotal support to move said driving element into driving relav tionship, an operator actuated pedal for ro tating said pivotal support in the opposite direction, and brake means rigidly mounted on said pivotal support and moving into en gagement after said driving element has' a curved body fitting the periphery of said support and below the plane of the top of said support, and a tip extending above the top of said support, said abutment-s being'spaced on opposite sides of a point diametrically opposite said tip and each comprising a simple headed element driven lightly into the side of i said support with a segment of its head pro-- jecting above the top of said support, and means for driving said support in such a direction that the tip of the clip follows the body thereof.

6. Compact finishing means comprising a rotary support, two fixed abutments and one resilient holding clip offset from the axis of rotation and spaced about the periphery of said support, said clip having a tip extending above the top of said support to engage the edge of the compact.

7 Compact finishing means comprising a rotary support, fixed abutment and resilient holding means spaced about the periphery of said support, said abutment means comprising a simple headed element driven lightly into the side of said support with a segment of its head projecting above the top of said support.

8. Compact finishing means comprising a rotary support facing upwardly, two fixed abutments and one resilient holding clip oifset from the axis of rotation and spaced about the periphery of said support, said abutments being spaced on opposite sides of a point diametrically opposite said clip. Y Y

9. Compact finishing means comprising a rotary support, a fixed abutment and a resilient holding clip, said clip having a curved g. body fitting the periphery of said support and below the plane of the top of said support, and a tip extending above the top of said supe port, and means for driving said support in such a direction that the top of the clip` follows the body thereof.

l0. Compact nishing means comprising a rotary support facing upwardly, .a resilient holding clip projecting above'the` plane `of the top of said support, and fixed abutment means positioned to receive the thrust of said clip and hold a superimposed compact against displacement in a horizontal plane, said clip and abutment means beingl offset from the axis of rotation in different directions.

1l. Compact finishing means comprising a abutment means positioned to receive the" thrust of said clip and hold a superimposed compact against displacement in va horizontal plane,said clip and abutment means being offset from the axis of rotation in different directions, said vabutment means leaving a clear space diametricallyopposite said clip, to permit access of the. operators finger, for the quick removal of a compact.

In testimony whereof, we have signed Vour names to this specification.

CHARLES E. ROBERTS. JOHN H. HELFRICH.

`rotary support facing upwardly, a resilient 

